Micro-hole locator



Dec. 1, 1959 N. ZANGER 7 MICRO-HOLE LOCATOR Filed June 25, 1958 2Sheets-Sheet 1 4-5 46 INVENTOR. F G 4 MW/V ZA/VG'ER BY W Dec. 1, 1959 N.ZANGQ 2,914,970

MICRO-HOLE LOCATOR Filed Jqnej23, 1958 2 Sheets-Sheet 2 INVENTOR. NATHAN ZANGER A as 7' 2312 1370" MrcRo-noLii ocAroR stanzas Es ays,Application Junerzs, 1958,:Serial No..743,642 s. i i 3 Cat (Cl. 7 7-963).Thisv invention relates .to an improved device for aligning workaccurately and rapidly under milling and -boring.

tools. i c v T The improveddevicecomprisesafoundation withparallel waysin which is slidably mounted a specialvise'for holding and locating theworkpiece accurately-in place. The desired position along the axis ofthe waysuis accurately located by means ofan adjustable micrometermounted on. the foundation piece in 'ai'position adapted to engagethework piece protruding from the vise. jaws.

The work piece is accurately located. in a transverse di-- rection bymoving thework piece-in the. vise and using arnicrometer mounted on. thevise'in a directiontra'ns-t Thus the transversemi-" verse to the firstmicrometer. crcmeter moves longitudinally with the vise and is ready inany longitudinal position. to accurately'locate'the work transversely.By this construction holes can be drilled or reamed in rapid successionby a rapid adjustment of the vise longitudinallya transverseadjustmentof';the work piece itself in the vise jaws. 1.;

Consequently it is a primary obje ctiof this invention to provide adevice whereby a plurality of holes can be drilled accurately andrapidly according to a predetermined pattern by moving a. vise inparallel ways and moving the work piece in parallel vise jawstransversely disposed relative to the ways.

Another object of this invention is the provision of longitudinallymovable vise jaws arranged transversely to the longitudinal directionwherein the vise includes a micrometer adapted to set the workaccurately in a transverse direction relative to the vise jaws.

Additional objects and novel features of this invention will bedisclosed in more detail in the following description, claims andappended drawings in which:

Figure 1 is a plan view of the foundation assembly on which the viseassembly is mounted.

Figure 2 is a longitudinal elevation of the foundation assembly.

Figure 3 is a plan view of the vise assembly.

Figure 4 is a longitudinal elevation of the vise assembly.

Figure 5 is a plan view of an assembly of the vise and foundationassembly showing a work piece clamped in place ready for a drillingoperation.

Figure 6 is a transverse elevation of the assembly of Figure 5.

Figure 7 is a partial sectional view throughthe retaining rod showingthe preferred method of aflixing the vise assembly relative to thefoundation assembly.

Figure 8 is a similar view depicting an alternate construction for theretaining rod.

Referring to Figures 1 and 2 the foundation assembly is seen to comprisespaced transverse end walls 10 and 11 having bearings 12 and 13. A rod14 is rotatably mounted in the bearings 12 and 13 by means ofcylindrical ends and 16. The portion of rod 14 between the ends 15 and16 is preferably of circular cross section with an axis eccentricallydisposed relative to the axis of the bearmicrometerpoint;

In Figures 3 and 4 the-viseassembly is seen to com-- I Figure 6).

, me I in'gs 12 and 13 thereby causing the-eccentric portion of rod 14towobble about the rotationahaxis during rotation. A handle 17 isprovided to actuate the rod 14.

Side walls 18 and 19 .inte'grally connect end walls 10 and 11 andinclude holes 20-, 21, 22 and 23 for mounting the' foundation assemblyon a drill work table (not shown).

A" micrometer 26 is mounted on" the side of the wall- 19 parallel to theways by means of a bracket 27 provided with a bore 28. The micrometer 26is carried by} a rod 29which is slidably" mounted in bore 28 andretained in various positions by cam lock 30! The rod 29 includes 'anupstandingsupportla'l throughwhich the micrometer-projects and isreferenced to. Thus the'z'ero" position of the micrometer ca'n beobtained at varying longitudinalpositionsby sliding rod 29 relative tobracket 27, and thenjtightening the lock 30} Whena desired'pc'w V sitionof thevise a'ssembly relative to the foundationha's been set via-themicrometer',-pins-32 and 33, whoselong'i I tudinal position is affixedby screws 34 and 35 are used" to retain the desired position acting as astop and the prevent'wear and tear on the micrometeris backed off toswivelly mouiited on a'reducedend 41 of screw 38 and an actuating handle42 is provided at the outer end to op erate the screw. Ano'pposing jaw43'with an accurately machinedtrarisve'rs'e clamping surface 44isprovided opposite jaw 39. Jaw 43 projects upwardly andi s integral withthe'base 45 of th'e' housing 36." Thus'rotation 'of the screw 38advances jaw 39 towards jaw 43. A locking plate 46 interconnects spacedguide blocks 47 and 48 which slide in ways 24 and 25. The plate 46 iscurved downwardly and fits in a recess in the foundation (see It isusedto frictionally retain the vise assembly in a desired fixed positionrelative to the foundation as will be made clearer below.

A micrometer support bar 49 is slidably mounted in a bore 50 through jaw43 and retained in desired transverse position by a cam lock 51. Amicrometer 52 is mounted through a collar 53, attached to bar 49, andused to zero the micrometer at desired transverse locations.

v A pin 54, mounted through blocks 47 and 48 is used to engage themicrometer 26 and reference the vise assembly relative to the foundationassembly.

In Figures 6 and 7, the function of locking plate 46 is seen moreclearly. In order to affix the vise assembly relative to the foundationassembly, the handle 17 is rotated causing eccentric rod 47 to engageplate 46 with sufficient friction to prevent longitudinal motion of thevise assembly.

In Figure 8 an elliptical rod 14-a is used instead of an eccentricallymounted rod, thereby providing clamping action by rotation of handle 17clockwise or-counterclockwise.

Referring to Figure 5, the operation is as follows:

The handle 17 is rotated to unlock the vise assembly and the viseassembly is moved longitudinally until the pin 54 contacts the head ofmicrometer 26 which has been set at the proper reading to provide thespacing between holes A and B. It is to be understood that hole B wasthe first hole drilled with the micrometer 26 set at zero. Havingdrilled hole B, the micrometer 26 is set at the reading corresponding todimension X and the vise assembly moved so that pin 54 contacts themicrom- 2,914,970 F htented D 1,

eter head. Jaw 39 is then loosened by means of handle 42 and the workpiece W can be moved transversely. Micrometer 52 is then set to read thedimension Y and the work piece is moved between the jaws until itcontacts the head of micrometer 52, whereupon the jaw 39 is againclamped against the workpiece. The drill is now centered accurately overthecenter of where hole A is to be formed. To make similarpredeterminedholes, the process is repeated with of course the properdimensions set on the micrometer.

The use of fixed accurately machined transverse jaws to align the workpiece in a transverse direction eliminates the need for aligning thevise jaws accurately at right angles to the longitudinal axis each timea hole is to be located in the transverse direction as is necessary inconventional milling or boring machines. Thus a great deal of time andeifort is saved and the work is efiected more accurately.

The conventional machines used for this purpose are generally not directreading. The settings are made by rotating a handle which moves a leadscrew a specific distance per turn. Therefore the operator must rememberand compute the number of turns required to locate the desired position.In the instant device the distances are read directly on the micrometerthereby eliminating errors that may occur through faulty computation.

Utilization of this device in connection with the usual boring ormilling tools used in small machine shops will greatly expedite the workand enable small shops to do work normally undertaken by large machineshops with complicated expensive equipment.

It is to be understood that other modifications can be effected topractice the disclosed invention without departing from the scope of theinvention. All such modifications within the skill of a trained mechanicare considered as within the spirit of this invention.

Having described in detail the nature of this invention, the claims areas follows:

1. An aligning device for boring and milling machines comprising afoundation with parallel ways and a' micrometer mounted on thefoundation parallel to the ways, said micrometer being longitudinallyadjustable relative to the foundation, in combination with a viseslidably disposed in said ways having means for affixing the vise to thefoundation at a plurality of positions along the axis of the ways, saidvise including means projecting therefrom adapted to engage the saidmicrometer for accurately centering the vise at desired locations alongthe ways, said vise also having a pair of jaws, one of which is movableparallel to the ways and the other jaw being fixed to the vise, saidjaws having opposing transverse faces, one of which is accurately set atright angles to the way axis and adapted to clamp a workpiece securelyto the vise.

2. A device as in claim 1 in further combination with a secondmicrometer mounted on the vise assembly along a transverse axis andadapted to engage said workpiece,

the second said micrometer being mounted adjustably on the said visewhereby it can be positioned in a plurality of transverse positionsenabling transverse centering of workpieces of varying dimensions.

3. A device as in claim 1 wherein the first said means comprise aneccentric rod swivelled in the foundation having bearings alignedparallel to the longitudinal axis of the ways, said rod being rotatablefrom a position locking the vise on the ways to a position releasingsaid vise for longitudinal movement including coacting means on the saidvise adapted to engage the said rod when it is in the first saidposition for the purposes of locking the said vise.

References Cited in the file of this patent UNITED STATES PATENTS1,757,929 Shaw et al. May 6, 1930 2,779,219 Lassy Jan. 29, 19572,835,156 Eklund May 20, 1958

